LM5020

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SNVS275F – MAY 2004 – REVISED APRIL 2006

Absolute Maximum Ratings

(1) (2)

VIN to GND

-0.3V to 100V

VCC to GND

-0.3V to 16V

RT to GND

-0.3V to 5.5V

All other pins to GND

-0.3V to 7V

Power Dissipation

Internally Limited

ESD Rating(3)

Human Body Model

2kV

Storage Temperature

-65°C to +150°C

Junction Temperature

150°C

(1)

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is intended to be functional. For ensured specifications and test conditions, see the Electrical Characteristics.

(2)

If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and

specifications.

(3)

The human body model is a 100 pF capacitor discharged through a 1.5k

Ω resistor.

Operating Ratings

VIN Voltage

13V to 90V

External Voltage applied to VCC

8V to 15V

Operating Junction Temperature

-40°C to +125°C

Electrical Characteristics

Specifications in standard type face are for TJ= +25°C and those in boldface type apply over the full operating junction

temperature range. Unless otherwise specified: VIN = 48V, VCC = 10V, and RT = 31.6k

Ω.

(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Startup Regulator

VCCReg

VCC Regulation

VCC = Open

7.4

7.7

8.0

V

VCC Current Limit

See(2)

15

22

mA

I-VIN

Startup Regulator Leakage

VIN = 100V

150

500

µA

IIN

Shutdown Current

VUVLO = 0V, VCC = open

250

350

µA

VCC Supply

VCC UVLO (Rising)

VccReg

VccReg -

V

- 300mV

100mV

VCC UVLO (Falling)

5.3

6.0

6.7

V

ICC

Supply Current

Cload = 0

2

3

mA

Error Amplifier

GBW

Gain Bandwidth

4

MHz

DC Gain

75

dB

Reference Voltage

FB = COMP

1.225

1.25

1.275

V

COMP Sink Capability

FB = 1.5V COMP= 1V

5

17

mA

UVLO Pin

Shutdown Threshold

1.225

1.25

1.275

V

Undervoltage Shutdown Hysteresis

16

20

24

µA

Current Source

Current Limit

ILIM Delay to Output

CS step from 0 to 0.6V

30

ns

Time to onset of OUT

Transition (90%)

Cycle by Cycle CS Threshold

0.45

0.5

0.55

V

Voltage

Leading Edge Blanking Time

50

ns

(1)

Limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation using

Statistical Quality Control (SQC) methods. The limits are used to calculate National's Average Outgoing Quality Level (AOQL).

(2)

Device thermal limitations may limit usable range.

Copyright © 2004–2006, Texas Instruments Incorporated

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